A SAP evaluation apparatus comprising: a main body installed with a lifting bar that is configured to be raised or lowered; a container portion installed under the lifting bar in the main body, comprising an internal containing space configured to contain an absorber; an operating portion connected to the lifting bar, comprising: a lifting plate that is configured to be raised or lowered within the internal containing space and to apply pressure to the absorber; and an injection portion configured to inject an ink in a direction of the absorber; a dispersion measurement portion for measuring dispersion of the ink through the absorber; and a controller installed at the main body configured to measure absorption of the ink into the absorber and to measure a swelling capacity of the absorber while the ink is injected into the absorber.